Photosynthesis And Respiration

Question 1

Describe the conversion of energy through the process of photosynthesis

Answer 1

Light energy is converted into chemical energy then stored in the sugar molecules produced

Question 2

What is the word equation for photosynthesis

Answer 2

C02 + water -> sugar + oxygen

Question 3

Describe stage 1 of photosynthesis

Answer 3

Light energy is absorbed by chlorophyll and some is used to split water into hydrogen and oxygen. ADP + Pi is converted into ATP. The oxygen is release into the atmosphere.

Question 4

Describe stage 2 of photosynthesis

Answer 4

The ATP produced in the first stage is broken down into ADP + Pi to combine hydrogen from stage one and carbon dioxide from the atmosphere to produce sugar.

Question 5

What is the fate of sugars produced by photosynthesis

Answer 5

Energy- sugar can be broken down by the process of respiration, then the energy can be used for cellular activities such as cell division
Can be converted into starch and stored until it needs to be used
Can be converted into cellulose and used to build the cell wall
Can’t be converted into fat
Can be combined with nitrates to make amino acids

Question 6

What 3 factors limit the rate of photosynthesis

Answer 6

Light intensity
Carbon dioxide concentration
Temperature

Question 7

Which cell activities require energy

Answer 7

Cell division (mitosis)
Protein synthesis
Active transport
Muscle contraction
Transmission of nerve impulses

Question 8

How is energy broken down and regenerated

Answer 8

Energy is released when ATP breaks down into ADP + Pi, and energy is required to regenerate it back into ATP

Question 9

What is respiration

Answer 9

The process of releasing energy from food

Question 10

Where does photosynthesis take place

Answer 10

Chloroplasts